This is not a chapter but a fighting scene where I try to make,

do tell me what to improve.

Shinsei and Itachi face off of each other, staring, while the atmosphere in the forest is heavy, Shin looked at Itachi then rush towards him readying his punch, Itachi follows to punch Shinsei who's punch is only a faint while dodging to the side and grab the arm of Itachi.

Itachi dodge the grabbing hand of Shinsei while doing a side step and sweep his leg towards shinsei while shinsei jump to avoid the sweeping leg of itachi and kick itachi mid air who dodge the kick, Shinsei then proceed to back off facing Itachi who do the same, they rushes to each other punching the face of itachi who twist his face to minimize the damage while he follows up a left hook towards Shinsei's liver who covered it with right arm.

Shinsei then kick Itachi at the stomach who fly back to the tree, he(Itachi) black flip and kick the tree for the balance, Shinsei See's this dash towards him and kick him to the head who dodge it by leaning (or is it bending?) his head with his body backwards, Shinsei follows up with an axe kick towards Itachi, who block it but can't completely blocked since his body is bended, he got to the ground coughing some saliva, Shinsei then smile and help itachi get up.

Shin:"I win"

Itachi:"Yeah,yeah*coughing* be gentle next time, you almost hurt my back"

Shin and Itachi look at laugh while Tsuyoshi is watching his brother and his best friend.